Catholic Church. Archdiocese of St. Paul (Minn.). (1955). Vital problems: A textbook for Catholic pupils attending high schools (Rev. ed.). Confraternity of Christian Doctrine of the Archdiocese of St. Paul.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCatholic Church. Archdiocese of St. Paul (Minn.). Vital Problems: A Textbook for Catholic Pupils Attending High Schools. Rev. ed. Saint Paul, Minn.: Confraternity of Christian Doctrine of the Archdiocese of St. Paul, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCatholic Church. Archdiocese of St. Paul (Minn.). Vital Problems: A Textbook for Catholic Pupils Attending High Schools. Rev. ed. Confraternity of Christian Doctrine of the Archdiocese of St. Paul, 1955.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.